Fuel-feeding apparatus and control therefor



Patented Feb. 20, 1923.

i UNETE@ id HAROLD o. SUEKERT, or NEW YORK, N. YQ,

COMPANY, INc., or New vonk, N. Y., A

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FUEL-Femme l.eier/p iniri-1us ynNio ooN'rnonrnnnniioRL 'f Application inea, Julie. i7, ieee.` *semi No. 339,722...

tank, and' two means for controllingv thesame. n `Accordingpto the present invention, a' fuel pump is operated from a source of pulsat- 'ing pressure, preferably a cylinder of an internal combustion motor, and the same is directly controlled byy the fuel pumped pump and when the yfuel vhas beenusedzup to `a sufficient extent to' require furtherA pumping, ythe lpump is automatically re-.

vleased and the pumping action resumed.

This can be accomplished in a variety oi ways within the scope of my inventionpbut in the illustrative form shown for the purpose of making my invention clearly under- Vstood-though not for 'purposesof limitation of the invention yhave showiitlie pump passing throughv a clutch member` which normally permits the purnprod to reciprocate freelybut which, Lwhen moved to clutching position', Operates to hold? the pump against `movement and I have shown'- the fuel being pumped into a closed or pres-4 1 sure tank and the clutch member operated 40 from a diaphragm, which is actuated in'one vdirection from the pressure in the tank and the opposite direction by means of a spring.

v In the drawings. showing the said=en1v vbodiment of my invention, F ig. l is a verti-4 cal sectional viewof theapparatus. Fig. 2 is a horizontal section on the line 2 2, Fig.

l. 'Fig 3 isa detail sectional' view von the line 3 3, Fig. l. Fig."4 isa fragmental sectional detail view, showing the clutchv member in holding position. i.

l Reference character `10 designates the fuel reservoir adapted tocontain liquid fuel, such aasfgasoline, under pressure.` i The reservoir 10 lias-a ringv 11 recess l5 for vided with cooling fins125. so that the pump is held ronioperation af- 1 ter suiiicient "fuel has been .supplied by they solderedk or otherwise secured tlieretoiabout its up- Mtaeziz ward margin and toy which c :astingl2fis..`

removably secured, as by means of screws 13. lCasting l2 'hasa downwardly extending portion orxboss 14 anda recess 15 is formed i .l 460 inthe upper face'of ycasting l2. A shell 16 is'secured to the. lower side of the casting` ,y

l2 and conta-ins a" diaphragm 17. VA zstem 418 is secured to the diaphragm ,17, and is provided Witha -head `19V extending into a i operating i the yclutch member20. f I On topoithe casting 12- is secured-a plate 2l, which covers the `recess l5 and is pro-v vided ,with an upward extension 22 con-` tainingI an adjustablv held sprin" 23 which actuates slide 24 to normally hola? 7o y l .the glut-chf rl member in inoperativeposition, as shown 1n Fig.-1. Cylinder-25de secured on plate 521 inline with boss 14 and Lis in `communicationeas through -a port 27v in its upper endgy with [a source of pulsating pressuregwhich maybe provided byconf 'necting saine withv a cylinderfof aninterpreferably `pro- "'.75 t Cylinder 25,.- r'eceivesf the? pistone. 26 au'dis:y j

sov

nal combustion engine.v .The connection be-g;

tween the `cylinder 25'- and the engine,v cylinder is open at alltimes. 'l y The pump `rod28 islv securedtothe' `pis.

ton 26 and -is encircled by' a' spring29, tendcork, or equivalent'material-,fisgpnovided' in `order to vcushion excessive4 shocks due4 to violent downward movement*A of piston 26. lThe space beneath piston 26 is in 'free communication with the outside air, asfbygmeans,

through an 'opening 21; invtheclutch member 20a-nd through thebore-l4. ofthe boss 14 on casting l2 andus providedin such` bore l4with a suitable fpackingivor gland ywhich may consist o-ixcotton, or other packoldi..

85 ing to raisel piston 26,# A .bumper SOO vreservoir l() vto the-pump on the down stroke the reservoir l0 about the flexible Washer y 88 to supply requirements for' engine fuel.

A syphonv outlet for the. fuel is provided in .reservoir l() of the type described and claimed on my prior copending` application, Ser. No. 335,648, filed November 4,

1.919, and may comprise an outer tube 39 having the plug 40 in its upper end and having inlet openings 4lv at or near its lower end and'containing an interior fuel outlet tube 42 having the openings at or near the upper end thereof and forming a syphon passage comprising the annular opening 44v land thei'bore 45 of tube 42.A Plug 40 is provided With a downwardly extending tubular p'ortion46' havingy a bore 47 extending Y the. pump diaphragm'V through the. upper facie of plug 40 and the.

said tubular extension 46 having the lower end thereof located a substantial distance beloW theinlets 4l of the syphon so as not to break the syphon seal. Passage 47 provides an outlet for air 'for gases and prevents an excessivel accumulation thereof Within the reservoir 10; such excess gases passing out With the fuel to the carbureter. p The mode of controllingthefuel feeding apparatus will be readily understood in connection with the foregoing.

The reciproc'able pumping apparatus normally moves up and down in response to pulsations 'of pressure in the engine cylinder AWhich are communicated thereto at all time While' the engine `is in operation and the fuel is pumped into the reservoir entering passage 37 on the dovvnstroke of and being discharged pastthe flexible Washer 38 on the up stroke.

As the pressure rises in the reservoir l0 -17 is forced upwardly pressure andthe head 19 of the diaphragm Y the action of sp stem 18'ser`ves on its pivot screws 48, 48 2) against ring" 28 into the position shown on; Fig, 4 in vvh'ichthe pump rod 28 is' held against movement* action of'clutch" member 20 aswvill be' readily' understood, and thus the movement' of the reciprocable pi'imping'n ydevice is stopped or reduced and'is again-resumed o'rincre'ased as the fuel level, and therefore, the pressure .in t'hfe reservoir falls upon outflow of th-rati to thefcarbureter-or other devies red from the reservoir 10Q by 'the to turn the clutch member`20v by the cantined v The invention may be embodied in forms other than that shown herewith for the purpose of illustration, so long as same comes Within thescope of my claim` and makes use of the principle of the invention.

l claim:

l. In fuel feeding apparatus, fuel pumping means operatedqfrom the course of pulsating pressure and a clutch member controlled by the fuel pumped and adaptedto clutch and hold the pumping means.

2. ln fuel feeding apparatus, reciprocable fuel pumping means operated from a source of pulsating pressure, and hold the pumping-means against reciprocatory movement. y

3. ln fuel feeding apparatus,-reciprocable fuel pumping meansE adapted to be permanently connected to an operating sourceof pulsating pressure such" as a cylinder of an internal combustion engine, a pressure reservoir to which liquid fuel is pumped by said pumping means, a clutch for holding said pumping means stationary or substantially so, and means operatedby the pressure in the reservoir for actuating` said holding means when the pressure Within the reservoir'rises and for pressure in the reservoir falls.

4. ln fuel feeding apparatus, a reciprocable pumping device adapted to communicate With and be actuated by a source ofpulsating pressure and comprising a recipro-` cable pump cup and a flexible Washer Within said pump cup and a pump rod, a clutch adapted to cooperatel With and hold said pump rod and means operated by ther fuel pumped for controlling said clutch.

5. In fuel feeding apparatus, a reciprocable pumping device including a piston exposed to a source of pulsating pressure: a pump cup, a rod for connecting said' piston and pump cup and a spring applied to said rod, a tank to which fuel is-pumped under pressure, and a clutch member adapted to cooperate With said pump and torclutch and `hold the same, and means for actuating ioo said clutch 'member adapted to be operated f a p'ivoted elutclimei'nber having. an: opening: through vwhich said pump rod'V passes, and means `controlled by the' fuel pumped for actuating said clutch member to cantfzthe same and thereby clut'oh-andholdthe:l pump rod against recip'rocaltory'movement 7. In a' fuell feedingiapparatus,apurping ymeans including a rod, a boss.' a-V cup' enclos- "ing the bom and operated-by the rod, aloose packing between the 'boss andv 'cup to alternately inspire" and' from the cup upon movement of the latter,`

expel the iuel'V` "inte and rod, and means operable by changes in pressure due to fuel accumulated to engage the free extremity of said arm whereby to rock the same and cause diagonally opposed edges at opposite sides of said arm to grip said rod to arrest reciproeation of the same.

9. In a fuel feeding device, a reservoir, a closure plate therefor, a boss formed on the plate extending into the reservoir, said bossl having an inlet passage, a rod extending,

through said boss, a cup mounted on one end of said rod and enclosing the boss, a loose packing between the cup and boss, a chambermounted on the plate receiving the other f )Y end of the rod and designed for a communication with an engine cylinder, a piston carried by the rod tting said chamber, yWhere- Aby fuel may bey fed to the reservoir by re` ciprocation of'said cup, and means operable by pressure changes in theA reservoir to control reciprocation of said rod.

10. A fuell feeding device including' a reservoir, means to pump fuel therein, a bell `shapedvcasing mounted inthe reservoir, al diaphragm mounted in the large end of lthe casing,a rod anchored'at one end to the dia- 7 phragm, and a .clutch engageable 'by the other end of said rod to control operationv of the pumping means upon vchanges of preso-- sure in the reservoir. y

In testimonythat I claim the foregoing, I hereto set my hand, this 12 day of June,

1920. Y HAROLD csUEKERT.; 

